Astrophotography by Keith B. Quattrocchi

                   Planetary Nebula in Gemini
                    Ha-RGB Image
                      Published: Sky and Telescope Gallery in August, 2017   
                        Copyright 2013
                      Keith B Quattrocchi


                                      Image Acquisition Information                      
                               Telescope:   16" RCOS Richey Chretien Telescope (ion milled at f/9) 
                               Camera:       SBIG STL-11000
                               Guiding:       SBIG 402
                               Filters:         Astrodon Ha-RBG Filters
                               Mount:        Software Bisque Paramount ME
                               Acquisition Programs:   The Sky,CCDAutopliot IV, CCD Soft, FocusMax 
                               Processing ProgramsCCDStack, Maxim DL, Photoshop
                               Date: Data processed May 26, 2014.  Data aquisition: February 22, 2014-
                               April 26, 2013                              
                               Time: 12 x30 min ( 6 hours) for each of Ha,R,G,B for a total of 24
                               Processing:  CCD Stack and PhotoShop CS/4
Image Infornmation:  Sh2-274 is a planetary nebula in Gemini. 
Processing Infornmation  This Ha-RGB image was obtained using  AstroDon H-a and RGB filters.  The LRGB images were assembled in CCDStack.  LRGB images were then compined in Photoshop.  Further stretching, high pass filtering and background smoothing was performed with Adobe Photoshop CS/4.  All data stretching was by minimal stretching with gamma and DDP in CCD Stack and then further stretching with curves/levels in photoshop.   

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